EV-391 Hard Disk/Floppy Controller Settings and Configuration

CONNECTIONS
Function	Location
34-pin control cable connector-hard drive	J1
20-pin data cable connector-drive 0	J2
20-pin data cable connector-drive 1	J3

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Normal operation	W1	pins 1 & 2 closed
	Factory test	W1	pins 2 & 3 closed
»	Normal operation	W2	pins 1 & 2 closed
	Factory test	W2	pins 2 & 3 closed
»	BIOS enabled	W3	closed
	BIOS disabled	W3	open
»	I/O port address 320h	W4	pins 2 & 3 closed
	I/O port address 324h	W4	pins 1 & 2 closed
»	BIOS size 32K or 64K	W5	pins 1 & 2 closed
	BIOS size 16K	W5	pins 2 & 3 closed
»	8 Head hard drive with RWC (Head Select 3 invalid)	W6	pins 2 & 3 closed
	16 head hard drive supported (Head Select 3 valid)	W6	pins 1 & 2 closed
»	Hard drive interrupt is IRQ5	W7	pins 1 & 2 closed
	Hard drive interrupt is IRQ2	W7	pins 2 & 3 closed
Note:SW1/switches 5, 6, 7, and 8 are reserved for BIOS functions and should not be altered.

BIOS DRIVE TYPE TABLE - SW1 (FOR EPROM REV. 3.92A)
#	Jumper 1 Drv. 1	Jumper 2 Drv. 1	Jumper 3 Drv. 0	Jumper 4 Drv. 0	Cap.	Hds.	Cyls.
0	closed	closed	closed	closed	42MB	5	977
1	open	closed	open	closed	21MB	4	615
2	closed	open	closed	open	10MB	2	615
3	open	open	open	open	10MB	4	306

MISCELLANEOUS TECHNICAL NOTES

This controller has a built-in low-level format program. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5.